76 



NOTES ON THE 



At Station A. 



Angle B, Highest peak 

 Angle B, South peak 

 Angle B, Popocatepetl 



At Station B. 



Angle A, Popocatepetl 

 Angle A, South peak 

 Angle A, Highest peak 



63° 49' 13".4 

 81 14 41.3 

 148 32 22.6 



31 11 14.5 



97 19 4.5 



114 43 43.5 



Length of base line 150™. 433 ± 0".002. 

 Direction of base line N. 7° 0' E. (true). 



Altitude of the West peak of Popocatepetl above the cave in the crater. 

 February 8, 1857. Small theodolite (3.5 feet above the ground). 



Station A. 



Station B. 



Depression of the cave in the crater 

 Distance of the cave from station A 20™. 4. 

 Angle B, West peak 

 Altitude of West peak 

 Altitude of station B . 



Angle A, West peak 

 Altitude of West peak 



32° 20' 



Length of base line 73™.40. 



